Scottish Gaelic

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Scottish Gaelic numbers (edit)
 ←  10 [a], [b] ←  19 20 30  → 
2[a], [b]
    Cardinal: fichead
    Ordinal: ficheadamh
    Ordinal abbreviation: 20mh

Etymology

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From Middle Irish fichetmad (compare Irish fichiú, Manx feedoo). By surface analysis, fichead +‎ -amh

Numeral

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ficheadamh

  1. twentieth